Type-writing machine.



' No. 717,837. PATENTBD JAN. 6, 1903.

G. GABRIELSON. TYPE WRITING MACHINE.

APPLICATION FILED OUT. 26, 1901.

INVENTUH TTURNEY T -a scams veTzM CQJPHOTO- ATENT OFFICE.

CARL GABRIELSON, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO UNIONTYPEWRITER COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORA-' TION OF NEIVJERSEY.

TYPE-WRITING MACHINE.-

SPECIFICATION forming part of Letters Patent No. 717,837, dated January6, 1903.

v Application filed October 26, 1901. Serial No. 80.036. (No model.)

T 60% whom it may concern:

Be it known that I, CARL GABRIELSON, a citizen of the United States,anda resident of Springfield, in the county of Hampden and State ofMassachusetts, haveinvented certain new and useful Improvements inType-VVriting Machines, of which the following is a specification. 1

My present invention relates to carriage- IO feed mechanisms fortype-writing machines, and more particularly to carriage-feed mechanisms employing an escapementwheel such, for instance, as that embodiedin the Well-known No. 6 Remington type-writing .15 machine; and theobject of my invention is to provide simple and effective means forpreventing a reverse or backward movement of the wheel when the carriageis moved back to the right to begin a new line of writing.

To this end my invention consists in the novel construction,arrangement, and combination of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a vertical sectional View,taken from front to rear, of sufficient number of parts of a typewritingmachine to illustrate my invention. Fig. 2 is a detail rear elevation ofa portion of the same with parts broken away more 0 clearly toillustrate the construction. Fig. 3 is a detail perspective view of thecombined feed-dog and escapementwheel stop. Fig. 4 is an enlarged detailrear elevation of a portion of the mechanism illustrated in Fig. 2

5 with parts broken away, the parts being illustrated in the arrestedpositions. Fig. 5 is a detail transverse sectional view taken on theline a: a; of Fig. 1.

In the accompanying drawings I have shown suificient of the mechanism ofa No. 6 Remington type-writing machine to illustrate my invention in itsapplication to that machine. The framing of the machine is designated as1, and the usual key-levers 2 are mounted in the framing and connectedby links3to type-bars 4. The platen 5 is mounted in a suitable carriage5, having the usual feed-rack 6. Parts of the carriage construction havebeen omitted from the drawings in order to simplify the views. Thefeed-rack 6 meshes with a pinion 7, that is carried upon a shaft 8,which rotates in a bearing 9, sup ported by a fixed portion of theframing of the machine. An escapement-wheel 10 is loosely mounted uponthe shaft 8 and may be turned in the direction of the arrow .2 in Fig,

2 with the pinion 7 to permit a feed movement of the rack 6 and thecarriage in the direction of the arrow y. When, however, the carriagewith the feed-rackG is moved in the'opposite direction, as indicated bythe arrow in Fig. 4, thefeedorescapement wheel remains stationary. Thisis accomplished by the usual spring-pressedpawls 8 that are pivoted to acylindrical housing 7 which is made fast to the shaft 8 byascrew, asshown in Fig. l, and these pawls are adapted to engage the teeth of aratchet-wheel 10 se cured to one face of the feed-wheel 10, so that amovement of the carriage from left to right will cause the pawls 8 toride freely over the teeth of the cooperating ratchet-wheehwhere as thepawls will engage the teeth of the ratchet-wheel 10 to prevent amovement of the carriage independently of the feed-wheel in the oppositedirection.

In order positively to maintain the feedwheel against reverse orbackward movement by the friction of the spring-pressed pawls when thecarriage is moved in the direction of the arrow in Fig. 4, Ihaveprovided a spe cial stop or detaining means for the feedwheel, whichwill be hereinafter described.

Beneath the key-levers 2 extends a universal bar 11, which is connectedat its ends to connecting-rods 12, that in turn are connected to armsprojecting from a bar 13, that is secured to an arm 13 of the feed-dogcarrier. This feed-dog carrier may comprise a rock-shaft 14, pivoted inthe framing of the 0 machine, and an arm 15, on which the feeddogs 16and 17 are mounted. The dog 17 may be termed a fixed dog, because it hasno movement in the direction of the movement of the carriage, though ithas a motion at 5 right angles to the carriage with the feed-dogcarrier. The dog 16 may be termed the movable or stepping dog, becauseit moves in the direction of movement of the carriage, as well astransversely thereto, to permit the 2 time? step-by-step feed of thecarriage. The movembody my invention except the substituable feed-dog 16is pivoted to the arm 15 of the feed-dog carrier, as indicated at 18, sothat it may vibrate independently of the carrier and in the direction offeed of the paper-carriage. The parts thus far described are of theusual construction, and the feed action takes place in the usual manner,though it should be understood that the feed-dogs and the parts whichcooperate therewith may be of any suitable construction. The dog-carrieris provided with the usual returningspring 1 The stepping feed-dog 16has operatively connected thereto a feed-wheel stop 19, which I preferto make as an integral part of the stepping-dog. The stepping-dog isprovided with a light coiled spring 20, that tends to maintain it out oflateral aliuement with the fixed dog, so that when it is free it will bemoved forward to cooperate with the next tooth of the feed-wheel to thatwhich is engaged by the fixed dog. This coiled spring, however, has alighter tension than the main spring of the carriage, so that when thecarriage-spring exerts its tension on the movable or stepping dog itovercomes the tension of the spring 20, as is usually the case.

From an inspection of Figs. 2 and 4 of the drawings it will be observedthat the form of the back 21 of each tooth of the stepping or feed wheel10 corresponds substantially to an arc struck from the pivot 18 of thefeed-dog in order that the stop 19, which turns about said pivot and inclose proximity to the outer end of the nearest tooth of said wheel,mayfreely vibrate from the position indicated in Fig. 2 of the drawingsto that represented in Fig. 4, whereby the stepping-wheel will beimmediately and automatically arrested before it has an opportunity tomove any appreciable distance in a backward or reverse direction. Itwill be understood that it may not be necessary to make the entire backof each tooth conform to the arc struck from the pivot 18. So long asthat portion of the back of each tooth which cooperates with the stop isstruck from this are the desired result may be obtained. A back stop 22may be provided upon the dog carrier to cooperate with adownwardly-extended projection 23 on the stepping-dog in order to limitthe movement of the dog in one direction, the usual front stop or anypreferred means being employed to limit the movement of the dog in theop posite direction.

WhileI have described one form or embodiment of myinvention, I wouldhave it understood that various modifications maybe made withoutdeparting from the spirit of my invention in order to adapt it tovarious forms of escapements.

It will be understood that the invention is readily applicable to theNo. 6 Remington type-writing machine with but few changes and that theexisting escapement mechanism of that machine requires no modificationto tion of certain parts for other detachable parts in the existingmachine.

The parts are shown in normal position in Fig. 1, wherein the movabledog 16 is in normal engagement with the feed-wheel. In operation adepression of, any of the key-levers or the spacing-key will cause thearm 13 to be depressed, thus moving the dog-carrier arm 15 forwardly andcarrying the fixed dog 17 into engagement with the teeth of thefeedwheel. This movement of the dog-carrier releases the movable dog,and the spring 20 thereof forces it forward one step, so that when thefinger of the operator is released from the key and the dog-carrier isreturned by its spring 14 the movable dog will be brought intoengagement with the-next tooth of the feed-wheel, and thecarriage-spring will advance the carriage one step or letterspacedistance. When the end of a line is reached, the operator moves thecarriag'e,together with its rack 6, back to the startingpoint and in thedirection of the arrowin Fig. 4:. This retractive movement of thecarriage causes the pinion 7 to be turned in the direction of the arrowthereon without transmitting movement to the feed-wheel 10 by reason ofthe pawl-and-ratchet connections 8 and 10*. The tension of the usualcarriagespring (not shown) being thus removed from the dog 16, thespring 20 will become effective to move said dog slightly to bring thestop 19 into engagement with the back 21 of a tooth on the feed-wheel,as at Fig. 4, and thereby prevent any backward'movement of the wheel. Assoon as the hand of the operator is removed from the carriage theefiective force of its spring is again exerted upon the feeding deviceor escapement through the pawls 8 and the ratchet-wheel 10 and it willcause a toothof the feed-wheel to bear against the movable dog, therebycausing a slight movement of the dog back into alinement with the dog17, and the stop 19 will be moved to the position indicated in Fig. 2,where it is out of engagement with the wheel, and the wheel may berotated in the direction of the arrow to permit the step-by-step feed ofthe carriage. By connecting the stop or abutment 19 with the movable orstepping dog the said stop may be arranged to be normally out of contactor engagement with the escapement'wheel, and thus avoid friction andwear during the rotative stepping movements of said wheel and during thestepping movements of said dog in the printing and feeding operations ofthe mechanism; but when the carriage is retracted and thecarriage-driving power or spring is opposed by the hand of the operatorthe'spring 20 operates instantly to vibrate the dog 16 and move the stop19 behind a tooth of the stepping-wheel, and thus block or arrest saidwheel against backward rotation. As soon 1 as the carriage-spring isagain permitted to act on the carriage the stop 19 is automaticallyrestored topnormal position .by the presnation of a stepping-dog, afeedwheel with which said dog cooperates and a stop controlled by saidstepping-dog and cooperating with the feed-wheel. V,

2. In a type-writing machine, the combination of a pivoted stepping-dog,a feed-wheel with which said dog cooperates and a stop carried by saidstepping-dog and cooperatingwith the feed-wheel. Y

3; In a type-writing machine, the combination of a feed-wheel, a dogfixed against movement in the direction of the feed of the carriage, adog which is movable in the direction of the movement of the carriage,and a stop which is controlled by the said movable dog and whichcooperates with the feedwheel to prevent a'reverse movement thereof.

4. In a type-writing machine, the combination of a feed-wheel, a fixeddog, a stepping-dog and a stop which is connected to and moves with thesaid stepping-dog and which cooperates with the feed-wheelie prevent areverse movement thereof.

5. In a type-writing-machine, the combination of a feed-wheel, feed-dogswhich cooperate with saidwheel and a movable stop normally out ofengagement with thefeede wheel to 'prevent a reverse movement of thefeed-wheel, the movement of said stop being controlled by a movement ofone of the dogs.

6. In a type-writing machine, the combination of a feed-wheel, feed-dogswhich cooperate with said wheel, and a stopwhich is normally out ofengagement with the feedwheel and which is operatively connected to oneof the dogs to move therewith to prevent a reverse movement of thefeed-wheel.

7. In a typeswriting machine,ithe combination of a feed-wheel,'feed-dogswhich cooperate therewith, a vibrating carrier on which said dogs aremounted and a stop carried by one of said dogs to prevent a reversemovement of the feed-wheel; said stop being normally out of engagementwith the feedwheel but adapted to cooperate therewith at the beginningof the retractive movement of the carriage.

8. In a type-writing machine, the combination of a -feed-wheel,feed-dogs which 00- operate therewith, a vibrating carrier upon whichsaid dogs are mounted,. and a normally disengaged stop that is carriedby one of said feed-dogs and cooperates with the feed-wheel and which ismovable with the dog independently of the feed-dog carrier at thebeginning of the retractive movement of the carriage.

. 9. In a type-writing machine, the combination of a feed-wheel, astepping-dog and a stop that is carried by the dog and moved therebyinto and out of stopping relation with the wheel at each feed operation.

10. In a type-writing machine, the combination of a "feed -wheel, apivoted springpressed stepping-dog and a stop that is carried by the dogand moved thereby into and out of stopping relation with the wheel ateach feed operation.

1l.- In a type-writing machine, the combination of feed-dogs, afeed-wheel cooperating therewith, a' pivoted automatically-operated stopwhich cooperates with said feed-wheel to arrest its reverse movement,the cooperating portion of the back of each tooth of the feed-Wheelconforming substantially to the are upon which said stop swings.

12. In a type-writing machine, the combination of feed-dogs,a'feed-wheel cooperating therewith, a pivoted automatically-operatedstop-which cooperates with said feed-wheel to arrest its reversemovement, the cooperating portion of the back of each tooth of the wheelconforming substantially to the are upon which said lock swings. r

13. In a type-writing machine, the combitherewith, a feed-pinionoperatively connected to said feed-wheel and adapted to move therewithin one direction and a feed-rack carried by the carriage and adapted tomesh with the feed-pinion, a pivoted automaticallyoperated' stop whichcooperates with said wheel to arrest its reverse movement, thecooperating portion of the back of each tooth of the wheel conformingsubstantially to the are upon which said stop swings.

14. In a type-writing machine, the combination of a feed-wheel,feed-dogs cooperating therewith and which are adapted to be moved Itransversely into and out of the path of the teeth of said wheel, and astop normally out of contact with the feed-wheel and a spring which isefiective to move the stop into engagement with the feed-wheel topreventa re verse movement thereof. I

15. In atype-writing machine and in an es capement mechanism, thecombination with the carriage and escapement-wheel, of a stop normallyout of contact with said wheel but adapted automatically to engage thesame during a retractive movement of the carriage.

16. In a type-writing machine and in an escapement mechanism, thecombination with the carriage and escapement-wheel, of a pivoted,spring-pressed stop normally outof contact with-said wheel but adaptedautomatically to engage the same during a retractive movement of thecarriage.

17. In a type-writing machine and in-an escapement mechanism, thecombination with a powerdriven carriage and an escapementwheel, of astepping feed-dog, and a stop normally out of engagement with said wheeland attached to'said dog, the said dog being normally in engagement withsaid escapementwheel, the construction and arrangement being such thatwhen the carriage is retracted against its driving poweiysaid stop willautomatically move into engagement with said 9 a nation of feed-dogs, afeed-wheel cooperating v Wheel to prevent backward rotation thereof andwill automatically return to the normal position as soon as the drivingpoweris again permitted to exert its force upon the carriage.

18. In a type-writing machine, the combination of a carriage, afeed-rack carried by said carriage, a pinion with which said rackmeshes, pawls adapted to rotate with the feedpinion, a ratchet-wheelwith which said pawls cooperate, a feed-wheel to which said ratchetwheelis connected, feed-dogs that cooperate with the feed-Wheel, and apivoted automatically-operated stop normally out of engagement with thefeed-wheel and controlled by a movement of one of said dogs during aretractive movement of the carriage.

19. In a type-Writing machine, the combination of a power-drivencarriage, a feed-rack carried by said carriage, a pinion with whichsaidrack meshes, a shaft upon which said Signed at the borough ofManhattan, city of New York, in the county of New York and State of NewYork, this 25th day of October,

A. D. 1901. I

CARL GABRIELSON.

Witnesses:

K. V. DONOVAN, E. M. WELLS.

